Which contains the greatest number of moles of oxygen atoms? (i) 1 mol of ethanol (ii) 1 mol of formic acid (iii) 1 mol of H_(2)O

Which contains the greatest number of moles of oxygen atoms? (i) 1 mol

1.	Which contains the greatest number of moles of oxygen atoms? (i) 1 mol of ethanol (ii) 1 mol of formic acid (iii) 1 mol of H_(2)O
Answer» Solution :(i) 1 mol of ETHANOL `C_(2)H_(5)OH` (ethanol) - Molar mass = 24 + 6 + 16 = 46 46 g of ethanol contains `1xx 6.023 xx 10^(23)` number of oxygen atoms. (ii) 1 mol of formic acid HCOOH (formic acid) - Molar mass = 2 + 12 +32 = 46 46 g of HCOOH contains `2xx 6.023 xx 10^(23)` number of oxygen atoms. (iii) 1 mol of `H_(2)O` `H_(2)O` (WATER) - Molar mass = 2+16=18 18 g of water contains `1 xx 6.023 x 10^(23)` number of oxygen atoms. `:.` 1 mole of formic acid contains the greatest number of oxygen atoms.